<?php
$x1 = 1;
$x2 = 1;
$a = 60;
echo $x1." ".$x2." ";
for ($N=1;$N<=($a-2);$N++)
{
$sum = $x1+$x2;
echo $sum." ";
$x1 = $x2;
$x2 = $sum;
}

?>